TY - GEN
T1 - CSI feedback reduction for energy-efficient downlink OFDMA
AU - Xiong, Cong
AU - Li, Geoffrey Ye
AU - Zhang, Shunqing
AU - Chen, Yan
AU - Xu, Shugong
PY - 2012
Y1 - 2012
N2 - The explosively increasing demand of high-data-rate multimedia wireless services and ubiquitous access has triggered rapidly booming energy consumption at the wireless network operator side. Therefore, energy-efficient design is becoming a mainstream for future wireless networks. In this paper, we study energy-efficient resource allocation in downlink OFDMA networks with partial channel state information at the transmitter (CSIT). To reduce the channel state information (CSI) feedback overhead while maintaining relatively high achievable energy efficiency (EE), we propose a novel CSI feedback scheme, which leads to higher EE with lower feedback overhead compared with the conventional selective feedback (SF) and bit-map based feedback (BF) schemes. Simulation results show that the energy-efficient design greatly improves EE compared with that of the conventional spectral-efficient design and our CSI feedback scheme outperforms the conventional CSI feedback schemes in EE and spectral efficiency (SE) with almost the same feedback overhead.
AB - The explosively increasing demand of high-data-rate multimedia wireless services and ubiquitous access has triggered rapidly booming energy consumption at the wireless network operator side. Therefore, energy-efficient design is becoming a mainstream for future wireless networks. In this paper, we study energy-efficient resource allocation in downlink OFDMA networks with partial channel state information at the transmitter (CSIT). To reduce the channel state information (CSI) feedback overhead while maintaining relatively high achievable energy efficiency (EE), we propose a novel CSI feedback scheme, which leads to higher EE with lower feedback overhead compared with the conventional selective feedback (SF) and bit-map based feedback (BF) schemes. Simulation results show that the energy-efficient design greatly improves EE compared with that of the conventional spectral-efficient design and our CSI feedback scheme outperforms the conventional CSI feedback schemes in EE and spectral efficiency (SE) with almost the same feedback overhead.
UR - http://www.scopus.com/inward/record.url?scp=84864373140&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2012.6213946
DO - 10.1109/WCNC.2012.6213946
M3 - Conference Proceeding
AN - SCOPUS:84864373140
SN - 9781467304375
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 1135
EP - 1139
BT - 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
T2 - 2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
Y2 - 1 April 2012 through 4 April 2012
ER -